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Sadiq Khan recently announced a major new initiative to tackle violent crime (Image: GETTY)

It is based on a scheme which successfully slashed knife and gun crime in Glasgow last decade.

Mr Khan said: “We have listened and researched the public health approaches in cities like Glasgow, where their own long-term approach over more than a decade has delivered large reductions in violence.”

Anyone with information is asked to contact police on 101 and quote CAD 8043/12Oct or call Crimestoppers anonymously on 0800 555 111.